There's a HLS in Garforth mentioned in Pooleys - it's listed as being at the "Hilton National Hotel" but I believe this has now become a Holiday Inn. With a landing fee of £35 (and the addition of a taxi fare), it might not be the most economical option... Also, using Garforth to access Leeds is about equidistant to using Coney Park/LBIA.
If you've got the right coloured helicopter, this pad becomes accessible(!):
Leeds General Infirmary (LS1 3EX)
Simon